397544447 has 4 divisors (see below), whose sum is σ = 398098080. Its totient is φ = 396990816.

The previous prime is 397544437. The next prime is 397544531. The reversal of 397544447 is 744445793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 397544447 - 2¹⁰ = 397543423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397544437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275738 + ... + 277175.

It is an arithmetic number, because the mean of its divisors is an integer number (99524520).

Almost surely, 2^397544447 is an apocalyptic number.

397544447 is a deficient number, since it is larger than the sum of its proper divisors (553633).

397544447 is an equidigital number, since it uses as much as digits as its factorization.

397544447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553632.

The product of its digits is 1693440, while the sum is 47.

The square root of 397544447 is about 19938.5166700033. The cubic root of 397544447 is about 735.2954814859.

The spelling of 397544447 in words is "three hundred ninety-seven million, five hundred forty-four thousand, four hundred forty-seven".